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Liquid silicon and preparation method thereof

A technology of liquid silicon and micro-silicon powder, applied in the field of liquid silicon and its preparation, can solve the problems of liquid inhomogeneity, easy rotten odor in storage of silicon liquid, etc.

Active Publication Date: 2016-01-20
NANJING YUNYUE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems in the prior art that the silicon liquid is easily rancid and uneven during storage, the present invention provides a liquid silicon, which can effectively inhibit the tendency of the silicon powder dispersion to settle and gel, and prolong the storage time

Method used

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  • Liquid silicon and preparation method thereof
  • Liquid silicon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 (comparative example)

[0051] 1) Put 560 grams of process water into the high-speed dispersion tank. Turn on the high-speed disperser in the dispersion tank, add 5.4 grams of FS20 dispersant and 5.4 grams of xanthan gum colloidal stabilizer at 2800-2900 rpm, and disperse at room temperature for about 5 minutes.

[0052] 2) Put 1120 grams of process water into the high-speed dispersion tank, add 1680 grams of silicon powder B1, turn on the high-speed disperser of the dispersion tank, disperse at room temperature for about 5 minutes at 2800-2900 rpm, and detect that the pH value is 7.8, add 1.2 grams of sulfuric acid ( 30%) to control the pH value to 6.4.

[0053] 3) Transfer to the adjustment tank and stir for about 1 hr at 40-100 rpm.

[0054] 4) Take a sample and measure the pH value to be 6.5, and control the viscosity at 40mPa.s.

Embodiment 2

[0056] 1) Put 1120 parts of process water into the stirring adjustment tank T-1, and put 560 parts of process water into the high-speed dispersion tank T-2. Open the dispersion tank T-2 high-speed disperser at 2900rpm.

[0057] 2) Turn on the adjustment tank T-1 to stir at 40-60rpm, and open the bottom circulation discharge valve, and at the same time turn on the submerged pump at the bottom of the dispersion tank T-2, and circulate the material back to the adjustment tank T-1 through the filter .

[0058] 3) Add 3.5kg of deodorant sodium percarbonate and 1.5kg of preservative sodium benzoate into the stirring adjustment tank T-1. After the material circulates for about 15 minutes, start to add 1680kg of silicon powder B1 to the dispersion tank T-2, check the pH value on-line to 7.8, and add 3.0kg of hydrochloric acid (10%) through a micrometering pump to control the pH value to 3.6.

[0059] 4) Keep circulating, about 1-2hrs, add silicon powder B1.

[0060] 5) On-line dete...

Embodiment 3

[0063] 1) Put 1120 parts of process water into the stirring adjustment tank T-1, and put 560 parts of process water into the high-speed dispersion tank T-2. Open the dispersion tank T-2 high-speed disperser at 1400rpm.

[0064] 2) Turn on the adjustment tank T-1 to stir at about 40rpm, and open the bottom circulation discharge valve, and at the same time turn on the submerged pump at the bottom of the dispersion tank T-2, and circulate the material back to the adjustment tank T-1 through the filter.

[0065] Add 6.5kg of deodorant sodium percarbonate and 3.0kg of preservative sodium benzoate to the stirring adjustment tank T-1. After the material circulates for about 15 minutes, start to add 1680kg of silicon powder A1 to the dispersion tank T-2, and check the pH value online to be 3.5.

[0066] 3) Add 28.5.0 kg of sodium hydroxide (10%) through a micro metering pump to control the pH value to 6.8.

[0067] 4) Keep circulating, about 1-2hrs, add silicon powder A1.

[0068] ...

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Abstract

The invention discloses liquid silicon and a preparation method thereof. The liquid silicon comprises: by mass, micro silicon powder 15-50%, quartz sand 5-60%, deodorant 0.01-0.2%, pH modifier 0.01-0.65%, pH return modifier 0.01-0.65%, antiseptic 0.05-0.2% and the balance process water. The SiO2 content in the micro silicon powder is more than 85 wt%, and the micro silicon powder has the average particle diameter of 0.1-0.15 [mu]m. The SiO2 content in the quartz sand is more than 95 wt%. The deodorant is selected from peroxide, hypohalite, potassium ferrate and sodium nitrate. The pH modifier and pH return modifier are acid or alkali and match with each other. The liquid silicon is prepared by returning adjusting pH process under the conditions of high-speed distribution and external reflux, and the final pH value is 4.2-7.2. The salt prepared by in-situ reaction during returning adjusting pH process is absorbed on the surface of the dispersive SiO2 floccule, so that the tendencies of sedimentation and gelation of the silicon powder dispersion liquid are inhibited effectively. The liquid silicon can save for 5-6 months, is without obvious tendencies of sedimentation layering and gelation, and has uniform seriflux and good fluidity.

Description

technical field [0001] The present invention relates to a kind of liquid silicon and its preparation method, more specifically to a kind of liquid silicon and its preparation method. Background technique [0002] API oil well cement has low permeability when the temperature is lower than 110°C, and the compressive strength increases with the increase of temperature, and when the temperature exceeds 110°C, especially when the temperature exceeds 125°C, the anti The compressive strength is greatly reduced and the permeability is greatly increased. This phenomenon is called high temperature degradation of cement stone strength. The higher the temperature, the more serious the degradation of the strength of the cement stone, resulting in the loss of the protection of the well wall, the support of the casing and the isolation, resulting in oil well damage. The admixture that can prevent the high-temperature strength degradation of cement stone, stabilize the strength of cement s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
CPCC09K8/426C09K2208/32
Inventor 李纪亮
Owner NANJING YUNYUE NEW MATERIAL TECH CO LTD
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